Unlock/Trunk Release Function Inoperative with Transmitter. Chevrolet PJJ 2000

For 1990-2009 cars

Step | Action | Value | Yes | No
--- | --- | --- | --- | ---
DEFINITION: Use this table when the Keyless Entry unlock/trunk release function is inoperative and the lock function operates normally.
1 | Did you perform the Keyless Entry Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Remote Keyless Entry
2 | Attempt to unlock the door locks using the lock switches inside the vehicle. Do the locks operate properly? | -- | Go to Step 3 | Go to Diagnostic System Check - Door Systems in Doors
3 | Use a scan tool to operate the trunk release. Does the trunk release operate properly? | -- | Go to Step 4 | Go to Diagnostic System Check - Body Rear End in Body Rear End
4 | Press the unlock/trunk release button of the transmitter. Does the system operate properly? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 5

5

1. Turn on the J 43241 Keyless Entry Tester.
2. Place the transmitter on the J 43421 test pad.
3. Press the unlock/trunk release button of the transmitter.

Does a tone sound and the green light illuminate on the J 43421 when the button is pressed?

--

Go to Step 7

Go to Step 6

6 | Replace the transmitter. Did you complete the replacement? | -- | Go to Step 8 | --
7 | Operate the transmitter within range of the vehicle. Does the door unlock/trunk release function operate properly? | -- | Go to Step 18 | Go to Step 9

8

Important: All transmitters which are to be recognized by the Remote Control Door Lock Receiver (Omron Module) must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter.

Perform the programming procedure. Refer to Transmitter Programming .

Do all of the keyless entry functions operate properly from the transmitter?

--

Go to Step 18

Go to Step 9

9 | Using a scan tool, observe the status of the RFA Unlock/Trunk Release Request Input parameter of the body control module (BCM) while operating the unlock/trunk release button of the transmitter. Does the value change from OFF to ON? | -- | Go to Step 15 | Go to Step 10

10

1. Turn ON the ignition with the engine OFF.
2. Disconnect the Remote Control Door Lock Receiver (Omron Module) connector.
3. Measure the voltage between the keyless entry unlock/trunk release request circuit and a good ground.

Does the voltage measure within the specified range?

B+

Go to Step 11

Go to Step 13

11

1. Turn ON the ignition, with the engine OFF.
2. Probe the keyless entry unlock/trunk release request circuit of the Remote Control Door Lock Receiver (Omron Module) with a test lamp that is connected to a good ground.

Does the Test lamp illuminate?

--

Go to Step 12

Go to Step 14

12 | Test the keyless entry unlock/trunk release request circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 15
13 | Test the keyless entry unlock/trunk release request circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 15
14 | Inspect for poor connections at the harness connector of the Remote Control Door Lock Receiver (Omron Module). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 16
15 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 17

16

Important: All transmitters which are to be recognized by the Remote Control Door Lock Receiver (Omron Module) must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter. Refer to Transmitter Programming .

Replace the Remote Control Door Lock Receiver (Omron Module). Refer to Remote Control Door Lock Receiver Replacement .

Did you complete the replacement?

--

Go to Step 18

--

17

Important: Replacement of the BCM will require a setup procedure to be performed. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

--

Go to Step 18

--

18 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 3